PLC 제어기를 이용한 아르곤 기화 시스템 자동제어에 관한 연구

Abstract

Recently, as research on the 4th industrial revolution has been conducted in various ways, interest in smart factories is increasing. The smart factory can be divided into five stages, from the stage of not applying ICT to the stage of upgrading. In this case, automatic control should be applied even at the lowest level, where ICT is not applied. In other words, automatic control is an essential component for building a smart factory. In the past, to apply automatic control, it was directly connected and controlled according to the circuit diagram. Today, however, PLC controllers are used that can be modified/supplemented using programming logic and are highly scalable and flexible. This study uses Siemens' S7-300 PLC controller, which can collect data in real-time among PLC and provides maximum precision and speed during machine manufacturing. In-order to consider all possible situations during system operation, it automatically controls the outlet temperature of the argon vaporization system based on SILS. At this time, the automatic control tool uses PID control, which is most commonly used in industrial sites due to its simple structure and high stability.